432 



GRASSES OF IOWA. 



The heads or spikes vary from one to three inches long, and 

 in some specimens five and six inches long. The seeds are 

 slightly pitted and very minutely cross-striated. A single 

 head produces an enormous number of seeds. These seeds 

 appear to have considerable vitality. Cultivated ground is 

 thickly seeded, hence it is almost impossible to remove the 

 weed. When fields are sown to oats this plant comes up in 

 the fall and late summer, seeding the soil. 



CHEMICAL COMPOSITION. 



The results of the analysis for one sample of this grass are 

 given below: 



NATURAL CONDITION. 



WATER FKHE SUBSTANCE. 



2.10 I 8 65 I (7.31) I 35 30 I 13.72 | 40 23 



The following aaalyses are added for comparison: 

 FRESH OR AIR- DRY SUBSTANCE. 



Yellow Fox-tail {Setaria glauca. Beauv.) grows in similar 

 situations. The leaves and stems are more succulent and have 

 a nutty flavor. It is probably more valuable from an agricul- 

 tural standpoint than the preceding species. 



BuU. S. D. Agrl. Exp. Sta. 40:42. 

 BuU. Tenn. Agrl. Exp. Sta. 9:90. 



